handleSubmit(event) {
event.preventDefault();
//other code before
let json=JSON.stringify(data);
let post_data={json_data:json}

 this.grabData(post_data)
  .then((response) => {
    console.log(response)
    var myObj = JSON.parse(response.data.json_data);
    console.log(myObj.length)
    var i;
    for (i = 0; i < 12; i++) {
      console.log("element " + i + " is: " + myObj[i])
    }
    this.state.urls = myObj;
    var z;
    for (z = 0; z < 12; z++) {
      if (this.state.urls[z] === "test") {
        this.state.urls.splice(z, 1);
        z = z - 1;
      }
    }
    console.log("After splicing: " + this.state.urls)
  });
}

grabData(post_data) {
  return axios.post('/getCharts', post_data)
}